import of dlcomment scripts from old system
adjustments for download comments in alix5
adjustments in download templates to show comment link
Merge branch 'alix5-pnw-dlcomments' into feature-dlcomments

Conflicts:
	www/admin/admin_dledit.php
	www/admin/admin_template_dl.php
	www/data/dlfile.php
	www/styles/lightfrog/0_downloads.tpl
alix6 adjustments for dl comments
minor adjustment
Merge remote-tracking branch 'sweil/alix6_neu' into feature-dlcomments
post-merge fixes for PDO and some other new changes
Merge pull request #76 from Thoronador/feature-dlcomments

add download comments